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Old 09-08-2020, 12:09 PM   #57
Flowtie1
 
Drives: 2017 ZL1
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Exactly what I did 20Bluezl1. I love it
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Old 09-08-2020, 08:58 PM   #58
Brorker23
 
Drives: 2019 Zl1 Vert
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Quote:
Originally Posted by 20Bluezl1 View Post
I'm going with ARH headers, hi flow cats and xpipe to NPP. Hopefully its not to loud.
This is my car cold start on dyno Kooks 2 in Lt no cats Borla Attacks


https://youtu.be/BfXU4S3XXyU
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Old 09-08-2020, 09:45 PM   #59
gtfoxy
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Quote:
Originally Posted by Brorker23 View Post
This is my car cold start on dyno Kooks 2 in Lt no cats Borla Attacks


https://youtu.be/BfXU4S3XXyU
Holy vertical vid Batman!

Sounds mean, but would definitely get annoying after 30.7 seconds of driving.
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Old 09-08-2020, 11:03 PM   #60
Brorker23
 
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Originally Posted by gtfoxy View Post
Holy vertical vid Batman!

Sounds mean, but would definitely get annoying after 30.7 seconds of driving.

Here is a clip driving down the highway my wife is recording about 6 to 8 cars behind me wait unit you here it wide open. Keep in mind 6 to 8 windows up and doing 65 mph

https://youtu.be/_5k1VwHQh_o
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Old 09-09-2020, 07:15 AM   #61
20Bluezl1

 
Drives: 2020 Zl1 A10 Riverside Blue
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Quote:
Originally Posted by Brorker23 View Post
Here is a clip driving down the highway my wife is recording about 6 to 8 cars behind me wait unit you here it wide open. Keep in mind 6 to 8 windows up and doing 65 mph

https://youtu.be/_5k1VwHQh_o
Yea that's loud. Hopefully my setup its not that loud.
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Old 09-09-2020, 12:00 PM   #62
laynlo15
 
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Drives: 2022 Lt1 A10
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Location: clark, mo
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I did the 1 7/8 BBK and made plenty of power (somewhere near 875 rwhp) on my Camaro. You still have to push the exhaust thru a 3" collector so I think unless you want to make 900 rwhp and up the 2" is not needed. I'm using Speed Engineering 1 7/8s on my 16 Vette. Smaller the primary the more torque you produce, larger is less. Your restriction is behind the collector. Bigger is not always better
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Old 10-14-2020, 11:55 PM   #63
GreenZLE
 
Drives: 2020 Rally Green ZL1-1LE
Join Date: May 2020
Location: Illinois
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Quote:
Originally Posted by GreenZLE View Post
I bought a pair of CSP's mid June and had them powder coated. Should be here in about another 2 weeks. No big hurry anyway as I still have to buy some green cats and a mid pipe.

LOL! 2 more weeks turned into this Monday FYI!
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Old 10-15-2020, 08:52 PM   #64
Zigg L1
 
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Drives: 2018 ZL1 Garnet Red Tintcoat A10
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This is what I got. First I got Borla Stype catback stock manifold and cats definitely louder and a nice tone.
Then along came the 1 7/8" kooks headers with high flow cats. Wow it was mean sounding. Almost Nascar loud. Idle sounded badass no dbout.
Lastly I added a Borla resonator to make it deeper and a better tone IMO. Took the volume down a little too. Step on it you hear it for sure!
Final product sounds great. Still loud but a nice refined tone. Kept the flaps for quite mode.
Definitely not cheap all said and done.
I was gonna go ARH full system which sounds great too but I wanted to keep the NPP functionality.
I am trying to upload a video for sound but having some difficulty changing the format from mp4 on my phone
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Old 11-18-2022, 12:48 PM   #65
2023ZL1
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I've got CSP 2" Headers on order with catless connection pipes that will mate up to a 3" MBRP Race catback with hemholtz resonators only.
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Old 11-18-2022, 01:48 PM   #66
KILLA BEE
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SOEED ENGINEERING FPR THE WIN. IVE HAD THEM ALL THESE SOUND JUST ASS GOOD IF NOT BETTER AND HALD THE PRICE
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